Anchor for artificial teeth.



J. W. IVORY.

1111011011 FOR ARTIFICIAL TEETH.

APPLICATION FILED NOV. 4, 1913.

Patented Sept. 15,1914.

INVENTUR WITNESSES ATTORNEYS\.

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JAMES W. IVORY, OF PHILADELPHIA, PENNSYLVANIA.

ANCHOR FOR ARTIFICIAL TEETH.

Specification of Letters Eatent.

Patented Sept. 15, 1914.

To all whom it may concern ie it known that I, JAMES W. Ivonr, a sub ect of the King of Great Britain, re-

siding in the city and county of Ihiladelin a dental plate, thus firmly connecting said tooth and plate.

It consists also of details of construction,v

as will be hereinafter set forth.

The invention is satisfactorily illustrated in the accompanying drawing, but the important instrumentalities thereof maybe varied, and so it is to be understood that the invention is not limited to the specific arrangement and organization shown and described.

Figures 1, tive views of anchors bodying my invention. section of the form shown. in Fig.

7, 9 and 13 represent perspecfor artliiclal teeth cm- Fig. 2 represents a 1, and

Fig. 3 represents a similar section including a section of an attached dental plate.

4. represents a rear view of an artificial tooth to which the invention is applied. Figs. 5 and 6 represent rear views of differently appearing anchors and portions of dental plates to which they are applied. Fig. 8 represents a section of the form shown in Fig. 7. Fig. 10 represents'a section of the form shown in Fig. 9. Fig. 11 shows the anchor made of a plurality of layers. Fig. 12 represents sectionof the form shown in Fig. 11. 14 represents a section of the form represents an elevation of the form shown in Fig. 13.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawmgs:-1 deslgnates an anchor which is composed of the limbs or tongues 2 and 3, the limb 2 extending from the limb 3 at an angle thereto forming a bifurcation therewith.

4 designates an artificial tooth the same having therein the vertically extending recess or passage 5, the same being adapted to receive the limb 2, leaving the limb 3 proshown in Fig. 13. Fig. 15

jecting rearward therefrom, on the exterior of the tooth.

6 designates a dental plate" in whichthe limb 3 is embedded, it being seen, referring to Fig. 3, that the material of said plate enters the recess 5 and extends above said recess and the end of the limb 2 and faces the back of the artificial tooth beyond said end and recess as at 7, whereby the limb is embedded in the tooth and the material of the dental plate, thus connecting the tooth and plate in a firm and effective manner.

In the limb 3 are openings 8 through which flow some of the material of the dental plate, thus clenching said limb with said plate and adding strength to the connection of the anchor with the dental plate;

As shown more'particularly in Figs. 1, 5, and 6, the end portion 9 of the plate of which the anchor is formed forward of the ing for a portion of the lingual side of the tooth beyond the adjacent edge of the dental plate.

Various means are employed for forming the limbs of the anchor. In Figs. 1, 2, and

3, the limb 2 is out out of the limb 3 and bent up therefrom.

In Figs. 7 and 8,the sides of the limb have flanges 10 angularly thereon, the same being adapted to be embedded in the material of the dental plate, thus providing additional means for firmly connecting the anchor and consequently the tooth with said plate.

In Figs. 9 and 10 the anchor is shown as made of a plurality of layers of material, thus increasing the strength thereof, the same being the case with the forms shown in Figs. 11 and 12, excepting that the forward end portion of the anchor which is comparatively the same as the facing 9 in Fig. 1,

only shown somewhat shorter, is formed with a lip 13 which is adapted to occupy the biting edge of thetooth.

In Figs. 13, 1 1, and 15, the limb 2 is doubled partly on itself and continued in the form of the bent tongue 14.- which is adapted to rest against the lingual side of the tooth, extending up from the base of the recess 5 to the top of the tooth, when it is deflected forwardly on said top, forming the flange 15 which embraces said top as additional means for clamping the anchor to the tooth and increasing the strength of connection of the anchor and the tooth. The

' of theterminals of said passage,itbeing noticed that the passage 5 is open on the;

'member 3 is provided with flanges 16 on the side thereof, for purposes similar to that shown in Figs. 7 and 8.

The anchor is formed primarily of a. plate, preferably metal, thesame being out to form the limb 2 which is turned up from the remainder of the plate, which remainder comprises the limb 3, said limbs thus being integrally continuous of each other As the limb 2 is removed from the material of said limb 3, the latter forms a bifurcation or two lengths, which when embedded in the ma terial of the dental plate firmly anchors said limb 3 therein.

Attention is specially directed to the fact that the recess or passage 5 extends through the tooth at the palatal face thereof, in the longitudinal direction thereof, from near the biting edge of the tooth toward the opposite edge into the ridge lap of the tooth, leaving the outwardly projecting pyramidal wall or bridge 17 integral with the poroelain or material of the tooth intermediate palatal face of the tooth excepting at the place of occupation of said bridge, whereby thematerial of the dental plate may cover the outer face of the limb 2- of the anchor 5 to the other section, or widens gradually throughout its length, and so produces the and be connected therewith, while said bridge flares from one section of the passage pyramidal wall above referred to, which wall is both wide and long for the engage the palatal face of the tooth, a portion of said limb abuts solidly against the exterior of the bridge '17, while also providing a metallic covering for the biting edge of the tooth and this with the other portions of the anchor makes a strong resistance to an force that may be exerted on the tooth. Furthermore the passage is flat or angular in cross section or from side to side, and the limb 2 is similarly shaped so that when it occupies said passage the anchor is prevented from turning therein.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, 1s 1- 1. An anchor for an artificial tooth ,composed of a plate having limbs thereon angularly to each other, one of said limbs beingintegral with the portion of the plate comprising the other limb and beingv cutout and turned-up from the same.

An anchor for an artificial tooth composed of a plate'havinglimbs thereon an- I gularly' to each other, one of said limbs being integral with the portion of the plate comprising the other limb and being cut-out and turned-up from the same, and a facing portion on the end portion of the plate extending from the angle of said limbs to the biting end of the tooth.

An artificial tooth provided with a passage therein, the same extending from 1 ing open on the exterior face of the tooth on opposite sides of said bridge, and said bridge widening outwardly from one end to the other.

g 5. An artificial tooth provided with a passage longitudinally therein, the same eX- tending from near. thebiting edge of -the tooth into the lap ridge thereof, and a bridge on the tooth'over said passage intermediate of the terminals thereof, and an anchor formed of a plate having limbs angularly thereon, one of said limbs being adapted to occupy-said passage, and the other limb being on the exterior of'the tooth and adapted to abut said bridge.

f JAMES IVORY. Witnessesz. V JOHN A.'WmDERsHnIM,

N. VBIUSSINGER.

Copies of this patent may be obtained for five cents each, byaddressing'the f commissioner of Patents, 1 Washington, D. C. i l i 

